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    SubjectRe: howto boost write(2) performance?
    Date
    On Tuesday 09 October 2007 23:50, Michael Stiller wrote:
    > Hi list,
    >
    > i'm developing an application (in C) which needs to write about
    > 1Gbit/s (125Mb/s) to a disk array attached via U320 SCSI.
    > It runs on Dual Core 2 Xeons @2Ghz utilizing kernel 2.6.22.7.
    >
    > I buffer the data in (currently 4) 400Mb buffers and use write(2) in a
    > dedicated thread to write them to the raw disk (no fs).
    >
    > The write(2) performance is not good enough, the writer threads take to
    > much time, and i ask you for ideas, howto to boost the write
    > performance.

    The kernel really cannot sustain 125MB/s? I assume the disk
    array is capable?

    Where is the bottleneck? Does it keep all disks busy, or are
    the CPUs overloaded?
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